Wrench



(No Model.)

F. M. 81; J. WIRTZ.

WRENCH.

No. 451,792. Patented May 5, 1891.

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UNTTED STATES PATENT OFFICE.

FREDERICK M. \VIRTZ AND JOHN WVIRTZ, OF COLUMBUS, OHIO.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 451,792, dated May 5, 1891. Application filed Tune 3, 1890. $erial No. 354,079. (No model.)

To all whom it may concern:

Be it known that we, FREDERICK M. WIRTZ and JOHN lV1RTZ,citizens of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Wrenches; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to that class of wrenches which operate with an automatic grip or bite; and it consists in a novel construction of such wrenches, as will be hereinafter described and specifically claimed.

In the accompanying drawings, Figure l is a side elevation of our wrench as it appears when closed. Fig. 2 is a side elevation of the same in an open position. Fig. 3 is a central longitudinal section of the wrench in theline co m of Fig. 2, and Fig. 4 is aside elevation of the sliding jaw.

The letter A in the drawings represents the handle of the wrench; B,a pivoted jaw-head, and O sliding jaw-head.

The handle A consists of a lower or handle portion a, of any known suitable construction, and a head portion a, which is provided with a hole a for the reception of a rivet-pin or screw-bolt a and with a number of cogs a of V shape concentrically arranged around said hole. By making the teeth of V shape their bases can be brought nearer together, and thus a greater number can be placed on a segment of given diameter and a perfect connection between the sliding jaw and bandle can be secured. The jaw-head B, which is connected to the handle by means of said pin or screw-bolt a consists of the jaw proper b and a head I), provided with a slot or chamber 19 which serves as a housing for the head portion a? of the handle and for the sliding jaw-head C. It is also provided with holes 19 for the reception of the rivet-pin or screwbolt a and with guiding-tongues b, on which the jaw-headC is caused to slide, as will presently appear.

The jaw-head 0 consists of the jaw proper c, a transverse shank 0, having guidinggrooves 0 which fit the said guiding-tongues b and a rack 0 formed of V-shaped teeth corresponding to and matching those on the segment of the handle formed along the edge of the shank c.

It will be seen from the drawings that the main pivoted jaw-head of our wrench is constructed in two parts f f, one of which is cast with two separated guiding and spacing bosses f through which and the other piece fot the jaw-head B uniting-screws b pass, as'shown, and by which screws the parts ff are united, so as to be divisible, as occasion requires, at the will of the user of the wrench. By making the jaw-head in two parts, as shown, it can be manufactured at less expense, as coring in the casting process will not be necessary to as great an extent as is the case when the jaw-head iscast in one piece, and by having the jaw-head in two parts the wrench can be taken apart whenever its moving portions become loose and rattling from wear, and the respective parts can be planed down, so as to insure a close fit upon one another when the two parts ff are again united by the screws b The operation of our wrench is very simple and easy of manipulation. With a thrust in a direction opposite to that in which the closed jaws b c are standing to the line of the handle the wrench is caused to open, as shown in Fig. 2, and in this position is applied to the screw head or nut to be operated. Now by pushing the jawproper 1) against the screw head or nut to be turned the jaw-heads B and O are turned back, and while the jawhead B simply swings around thepin C03 the jaw-head O is drawn by means of the cogs a and rack 0 toward the jaw-head B until the jaws b 0 close tightly upon. said screwhead or nut and turn it. The grip of said jaws is increased by the resistance of the clamped. object, and yielding and slipping of the wrench is entirely avoided.

What we claim as our invention is 1. The within-described wrench as an improved article of manufacture, consisting of the handle A, provided with a segmental end or head having gear-teeth, the main jaw-head B, pivoted to the saidhandle and constructed of two parts ff, which are united in a divisible manner to one another by suitable means, one of said parts having guiding and the handle A, provided with segmental head or end having gear-teeth of V shape, the main jaw-head B, pivoted to the said handle and constructed of two parts ff, which are united in a divided manner byscrews, one of said parts having guidingand spacing bosses and each part having a guiding-tongue, and a moving jaw 0, provided with a tangential shank, forming a guiding portion and having a groove on each of its sides and gear-teeth of V shape on one of its edges, said shank fitting guiding-tongues in the main head and being guided by said tongues and the bosses and caused to move tangentially by the segmental toothed end of the handle gearingi to its teeth, substantially as described.

In testimony whereof we hereunto afiix our signatures in presence of two witnesses.

FREDERICK M. WIRTZ. JOHN WIRTZ. Witnesses? J OE DURTPALER, VALENTINE SoHMITT. 

